Nut and bolt lock.



C. C. GROSS.

NUT AND BOL-T LOCK.

APPLICATION FILED JULY 18, 1912.

Patented June 10, 1913.

Imam/for 69544 14,. 7

\ eflf/fomeq UNTTE CHARLES CARROLL CROSS, OF PHILADELPHIA, PENNSYLVANIA.

NUT AND BOLT LOCK.

Specification of Letters Patent.

Patented June 16 1913.

3 Application filed July 18, 1912. Serial No. 710,129.

To all whom it may concern:

Be it known that I, CHARLES C. Cnoss, a citizen of the United States of America, residing at the city of Philadelphia, county of Philadelphia, State of Pennsylvania, have invented certain new and useful Tmprovements in Nut and Bolt Locks, of which the following is a specification.

This invention relates to a nut and bolt lock, and its object is to provide a new and improved device of this nature which shall be effective to hold the nut and bolt 1n rigid relation when desired, and at the same time be simple to operate and capable of being produced at a small cost.

Described in general terms, the lock consists of an eccentric or cam apertured to fit the nut, and locking means adapted to engage the bolt and connected to the eccentrlc to be forced thereby into locking engagement with the bolt.

Preferably, the locking means consists of a plate provided with a tapering slot, the edges of the slot having teeth disposed in the direction of the small end of the slot, the plate being provided with a wiper 0r follower placed opposite the large end of the slot and adapted to engage the eccentric to move the plate and bring the edges of the slot at the small end into engagement with the bolt. Means may also be provided for locking the eccentric to hold the parts 1n fixed relation.

A nut or bolt lock, constructed in accordance with my invention in its preferred form, is illustrated in the accompanying drawing, in which Figure 1 is a top plan of the nut, bolt and lock, assembled, and in looking posltion. Fig. 2 is a plan of the eccentric. Fig. 3 is a plan of the locking plate. Fig. 4C is a vertical, central section showing the nut and bolt in elevation.

The device, as illustrated, consists of a locking plate 1 and an eccentric or cam 2, the locking plate being provided with a tapering slot 3, the inclined edges e of which are provided with teeth 5 disposed toward the small end of the slot, thewidth of the slot at the large end being greater and at the small end less than the diameter of the bolt 6. At its edge, in alinement with the slot and opposite the large end of the latter, the locking plate 1 is provided with a follower 7 to engage the edge of the eccentric 2. This follower, as shown, is formed integral with the plate and consists of a tongue or extension thereon, bent up at right angles to the plate at S and at a distance above the surface of the plate equal to the thickness of the eccentric 2, being turned inward at 9. The top arm 10 of the follower, which is thus turned in, is provided at one side with a projecting member 11 which acts as a latch.

This latch is slightly resilient and is bent down to engage radial grooves or notches 12 provided in the eccentric for this purpose, and the eccentric itself is provided with an aperture 13 to fit the particular size and shape of nut 1-1- to be used so that the eccentrio may be passed over the nut, the latter occupying the aperture 13 and in this way connected to the nut whereby the eccentric and nut turn together. In this connection it will be noted that the eccentric is beveled at its top edge at 15 along the portion of its periphery 16 having the least radius. This is done to facilitate the seating of the eccentric and passing under the cam follower 7.

In operation the bolt is passed through the member or members to be held, and the looking plate 1 is passed over the projecting end of the bolt, the bolt extending through the slot. The nut is then screwed down on to the plate and turned to a bearing, after which it may be rotated backward a half turn. The eccentric or cam 2 is then passed over the nut, the short radius as at 15 being disposed toward the follower 7. The nut carrying the eccentric is again turned tobearing position. The eccentric, as it rotates, engages with its periphery 16 the follower 7, and as the radius of the portion of. the eccentric engaging the follower increases, the plate 1 is forced to one side so that before the follower reaches the greatest radius of the eccentric, the bolt occupies a position near the small end of the slot 3, the teeth 5 being embedded in its cylindrical surface,

locking it to the plate 1. At this time the latch 11 engages one of the notches 12 and holds the eccentric against rotation in the reverse direction. Thus, with the locking plate rigidly secured to the bolt by means of the teeth 5, and the eccentric likewise secured to the nut which fits the aperture 13 provided in the eccentric for this purpose, and the eccentric and plate held against relative rotation by the latch 11 and by the increasing diameter of the eccentric, the parts are all held in fixed relation to each other and the bolt and nut are rigidly connected and relative rotation thereof is pre vented.

it will be readily understood that the de vice is simple in construction, effective in operation, and may be produced by means of an automatic machine at a. cost little ex eeeding that of two Washers ot the ordinary type.

Having thus described. my invention specifically and in detail, I desire to have it understood that the specific terms herein are used in their descriptive rather than in their limiting sense, and the scope of the invention is defined in the claims.

I claim 1. A nut and bolt lock consisting of a cam apertured to fit the nut, locking means adapted to engage the bolt and connected to the cam to be forced thereby into locking engagement with the bolt.

A nut and bolt lock consisting of a cam apertured to fit the nut and rotate there with, locking means adapted to engage the bolt and connected to the cam to be forced thereby into locking engagement with the bolt, and means for locking the cam against rotation.

3. A nut and boltlock consisting of a plate having a tapering slot for the bolt, the smaller end of which is of a Width less than the diameter of the bolt, and means rotating with the nut and adapted to engage the plate and force it to one side so that the narrow portion of the slot engages the bolt and looks it.

4. A nut and bolt lock consisting of a cam having an aperture to receive and fit the nut, and a member having a tapering elongated slot to receive the bolt and provided with means opposite the large end of the slot for engaging the edge of the cam to force the slotted member to one side in the direction of toe length of the slot and bring the narrow portion of the slot into engagement with the bolt.

5. A nut and bolt lock consisting of a cam having an aperture to receive and fit the nut, and a member having a tapering elongated slot to receive the bolt and provided with means opposite the large end of the slot for engaging the edge of the cam to force the narrow portion of the slot into engagement with the bolt, and means for locking the cam against rotation.

Signed by me at Philadelphia, Pa, this 13th day of July, 1912.

CHARLES CARROLL CROSS.

Witnesses ARTHUR D. BAKER, R. V. PETERSON, 3rd.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G. 

